title: Blood gonadotropin studies during pregnancy in relation to the fetal sex.
authors.forename: H E
authors.initials: HE
authors.lastname: NIEBURGS
authors.forename: R B
authors.initials: RB
authors.lastname: GREENBLATT
mesh_terms: D006063:Chorionic Gonadotropin; D005260:Female; D005333:Fetus; D006062:Gonadotropins; D006801:Humans; D011247:Pregnancy; D012725:Sexual Behavior
chemical_list: D006063:Chorionic Gonadotropin; D006062:Gonadotropins